Results
99-24-16: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that requires removal of cable guards in the lateral control system and replacement with new, improved cable guards. This amendment is prompted by reports of high control wheel forces and restricted control wheel movement. The actions specified by this AD are intended to prevent deterioration of cable guards in the lateral control system, which could result in a jam of the lateral control system and consequent reduced lateral controllability of the airplane.
83-13-05: 83-13-05 AIRBUS INDUSTRIE: Amendment 39-4675. Applies to the model A300 series airplanes, certificated in all categories. To prevent failure of certain components of the main and nose landing gears, within 250 landings after the effective date of this AD or prior to the accumulation of the number of landings specified in each paragraph below, whichever occurs later, accomplish the following, unless previously accomplished: A. Reinforce the lower torque link pins of the main landing gear in accordance with the instructions of Messier-Hispano-Bugatti (MHB) Service Bulletin 470-32-065, dated September 3, 1976, prior to the accumulation of 12,000 landings on B1 model aircraft, and 16,000 landings on B2-100, B2-200, B2-300, B4-100, B4-200 and C4-200 model aircraft, having the serial numbers specified in Airbus Industrie (AI) Service Bulletin A300-32-077, Revision 1, dated February 19, 1980. B. Modify the main landing gear drag strut of aircraft with serial numbers specifiedby AI Service Bulletin A300-32-114, dated January 13, 1978, in accordance with the instructions of MHB Service Bulletin 470-32-110, dated November 28, 1977, prior to the accumulation of 20,000 landings. C. Modify the actuating cylinder of the main landing gear for aircraft with serial numbers specified by AI Service Bulletin A310-32-116, Revision 6, dated September 17, 1982, in accordance with the instructions of MHB Service Bulletin 470-32-108, Revision 1, dated November 24, 1978, according to the following schedule: 1. For aircraft with modifications AI 1799 and 2025 originally installed, prior to the accumulation of 32,000 landings on B2 models or 22,000 landings on B4 models. 2. For aircraft with modifications AI 1799 and 2025 not originally installed, prior to the accumulation of 12,000 landings on both models B2 and B4. D. Incorporate modifications MHB 151 and 161 on the shock strut connecting rod of the main landing gear of aircraft with serial numbers specified in AI Service Bulletins A300-32- 096, Revision 4, and A300-32-076, Revision 3, both dated September 17, 1982, in accordance with the instructions of MHB Service Bulletins 470-32-039 and 470-32-040, Revision 1, both dated October 31, 1980, prior to the accumulation of 12,000 landings. E. Incorporate modification MHB 59 on the brace assembly actuating cylinder of the main landing gear of aircraft with serial numbers specified in AI Service Bulletin A300-32-036, Revision 2, dated September 17, 1982, in accordance with the instructions of MHB Service Bulletin 470-32-031, dated January 8, 1976, prior to the accumulation of 17,500 landings. F. Replace the actuating cylinder piston of the nose landing gear of aircraft with serial numbers specified in AI Service Bulletin A300-32-904, Revision 5, dated September 17, 1982, in accordance with the instructions of MHB Service Bulletin 470-32-033, dated January 9, 1976, prior to the accumulation of 14,000 landings. G. For the purpose of this AD, and when approved by an FAA maintenance inspector, the number of landings may be computed by dividing each airplane's time in service by the operator's fleet average time from takeoff to landing for the aircraft type. H. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. I. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. This amendment becomes effective July 7, 1983.
99-25-02: This amendment adopts a new airworthiness directive (AD) that is applicable to all Boeing Model 737-100, -200, -300, -400, and -500 series airplanes. This action requires a one-time inspection to verify correct installation of the fastener that connects the input rod of the spoiler mixer mechanism to the torque tube crank, and corrective actions, if necessary. For certain airplanes, this action requires replacement of the nut, bolt, and cotter pin that connects the input rod of the spoiler mixer mechanism to the torque tube crank with a new or serviceable nut, bolt, and cotter pin. This amendment is prompted by reports indicating numerous discrepancies in the installation of the fastener that connects the input rod of the spoiler mixer mechanism to the torque tube crank. The actions specified in this AD are intended to prevent the linkage between the ratio changer input rod and the aft aileron control quadrant from becoming disconnected, which could result in reduced controllability of the airplane.
82-18-01: 82-18-01 EMBRAER: Amendment 39-4440. Applies to EMB-110P1 and EMB-110P2 models (S/Ns 110001 through 110329 and 110331 through 110339), airplanes certificated in any category. Compliance: Required on or before December 31, 1982, unless previously accomplished. To prevent leakage of water into the fuel tank, accomplish the following: (a) Defuel the airplane in accordance with the EMB-110 maintenance manual. (b) Remove the fuel filler neck components from each tank and install EMBRAER Kit S.B. 110-28-020 in accordance with the instructions contained in EMBRAER Service Bulletin 110-28-020, dated July 2, 1981. (c) An equivalent method of compliance may be used, if approved by the Chief, Atlanta Aircraft Certification Office, ACE-115A, Federal Aviation Administration, P.O. Box 20636, Atlanta, Georgia 30320. This amendment becomes effective September 27, 1982.
2022-18-05: The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A318, A319, A320, and A321 series airplanes. This AD was prompted by unclear and incomplete placard instructions for the doghouse door lock. This AD requires installing improved handling instruction placards on affected doghouses and re-identifying the doghouses, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD also prohibits the installation of affected doghouses under certain conditions. The FAA is issuing this AD to address the unsafe condition on these products.
2014-12-01: We are superseding Airworthiness Directive (AD) 2013-11-05 for Bell Model 214B, 214B-1, and 214ST helicopters with certain tail rotor [[Page 32860]] hanger bearings (bearing) installed. AD 2013-11-05 required inspecting the bearing to determine whether an incorrectly manufactured seal material is installed on the bearing. This new AD retains the repetitive inspection of the bearings and also requires replacing the defective bearings. This AD was prompted by a report that certain bearings were manufactured with an incorrect seal material that does not meet Bell specifications. We are issuing this AD to prevent failure of the bearing and subsequent loss of control of the helicopter.
56-27-02: 56-27-02 HILLER: Applies to All UH-12, UH-12A and UH-12B Helicopters Including Spares. Compliance required as soon as possible but not later than February 28, 1957. Investigation has revealed that defective welds may exist at the clamp lugs on the four upper lord mount supports on P/N 63100-2 lower frame assembly (engine mount), or on mounts, P/N 63100-2M, modified in accordance with Hiller Service Bulletin No. 51. Failure of this weld has resulted in tilting of the rotor mast and loss of collective pitch control. The following one-time inspection is required on the above mounts to detect possible defective welds which must be reworked as indicated. 1. If the engine mount is cadmium plated, no inspection of the weld will be required, since these lower frame assemblies have been fabricated subsequent to the period of questionable weldments. 2. If the engine mount is not cadmium plated, remove the paint from all four lord mount supports in the area of the clamplugs and inspect for identification markings in or around the weld at the clamp lugs. If the weld is stamped with either a 7 or 8 or no stamp at all, it will be necessary to remove the mount from service until such time as the lugs can be removed and rewelded to CAM 18 standards. (Hiller Service Information Letter No. 111 covers this subject.)
79-10-06 R1: 79-10-06 R1 ENSTROM HELICOPTER CORPORATION: Amendment 39-3465 as amended by Amendment 39-4342. Applies to all Model F-28C and 280C helicopters. Compliance required as indicated. To prevent tail rotor failures as a result of tail rotor blade grip cracks, accomplish the following: A) Prior to next flight after receipt of this AD and prior to each flight thereafter, visually check the tail rotor blade grips in the vicinity of the blade retention bolt holes for any evidence of cracks with at least a 10X glass. Pilot may make this check. If any cracks are found, the blade and grip unit must be replaced with a serviceable unit before further flight. B) Prior to the next 50 hours' time in service after the effective date of this AD, unless already accomplished, remove the tail rotor blades from the blade grips and examine the grips in the vicinity of the blade retention bolt holes using standard dye penetrant inspection methods. Caution - care must be taken not tointermix blades and grips as they are match drilled sets. If any cracks are found, before further flight, remove the blade-and-grip unit and replace with a serviceable unit having either P/N 28-150013-1 or 28-150044-1 grips. Install replacement grips in accordance with paragraph C) of this AD. C) Install serviceable replacement P/N 28-150013-1 or P/N 28-150044-1 grips in accordance with applicable Enstrom Service Directive 0048, dated April 5, 1979, or 0048, Revision A, dated September 8, 1980, as outlined below: (1) Install P/N 28-150013-1 grips, in accordance with Enstrom Service Directive 0048, dated April 5, 1979, as follows: (a) By hand with the use of a 100 degrees - 1/2 inch back countersink (#AT4021-4) and a 3/16 inch pilot (#AT404-4), or equivalent tools, chamfer the edges (8 per grip) of the retention bolt holes in the blade grip .015 x 40 degrees. Repeat the same operation on each tail rotor blade retention bolt hole (4 places). After chamfering, thoroughly inspect the grips and blades for any nicks, burrs, or sharp edges. If any are found, they should be blended out by crocus cloth. (b) Replace the close tolerance bolts using a lubriplate compound and retorque to 50-75 in. lbs. (2) Install, P/N 28-150044-1 grips in accordance with Enstrom Service Directive 0048, Revision A, dated September 8, 1980, as follows: (a) Tail rotor assemblies incorporating Spindle P/N 28-150014-13 only are eligible for this alternate means of compliance. The part number is etched on the side of each spindle. Spindle P/N 28-150014-13 may be further identified by their shoulder-to-shoulder dimension and the rotor assembly's overall Tip-to-Tip length which are 3.46 + .01 and 56 7/16 inches, respectively. (b) Installation of Tail Rotor Blades on Tail Rotor Blade Grips P/N 28-150044-1 to comprise Blade and Grip Assemblies, P/N 28-150001-5 must be accomplished by Enstrom Customer Service. (c) Operators must send the old Tail Rotor Blade and Grip Assemblies P/N 28-150001-3 to Enstrom Customer Service Center for rework. D) Replace the close tolerance bolts using a lubriplate compound and retorque to 50 - 75 in. lbs. E) Preflight inspections required by paragraph A) of this AD may be discontinued after the installation of P/N 28-150044-1 grips. Enstrom Service Directive Bulletin No. 0048 also applies to the subject matter of this AD. Amendment 39-3465 became effective upon publication in the Federal Register, as to all persons except those to whom it was made immediately effective by the airmail letter dated April 9, 1979, which contained this amendment. This Amendment 39-4342 becomes effective March 19, 1982.
85-03-01: 85-03-01 CESSNA: Amendment 39-4995. Applies to Models 205 (S/Ns 205-0001 thru 205- 0479); 206, U206, U206A, U206B, U206C, U206D, TU206A, TU206B, TU206C, and TU206D (S/Ns 206-0001 thru U206-1444); P206, P206A, P206B, P206C, P206D, TP206A, TP206B, TP206C, and TP206D (S/Ns P206-0001 thru P206-0603); 207 and T207 (S/Ns 20700001 thru 20700148) 210B, 210C, 210D, 210E, 210F, 210G, 210H, and 210J (S/Ns 21057841 thru 21059199); T210F, T210G, T210H, and T210J (S/Ns T210-O001 thru T210-0454) airplanes certificated in any category. Compliance: Required within 100 hours time-in-service after the effective date of this AD, unless already accomplished. To reduce the possibility of engine controls failure and loss of engine power control accomplish the following: (a) Visually inspect the ends of the engine throttle and mixture control cables to determine if the sleeve and bushing are secured by a drive screw. If so, inspect, modify, and/or replace engine throttle and mixture controls in accordance with Cessna Single-Engine Service Letter SE69-16 dated July 22, 1969. (b) The airplane may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished provided reduced mixture selection during flight is not performed and the throttle and mixture controls are determined to be functioning properly during preflight inspection of the airplane. (c) An equivalent means of compliance with this AD may be used if approved by the Manager, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Room 100, Mid- Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4400. This amendment becomes effective on March 15, 1985.
2014-11-01: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of smoke or flames in the passenger cabin of various transport category airplanes related to the wiring for the passenger cabin in-flight entertainment (IFE) system, cabin lighting, and passenger seats. This AD requires installing wiring and making changes to certain electrical load management system (ELMS) panels and other concurrent requirements to ensure the flightcrew is able to turn off electrical power to the IFE systems and other non-essential electrical systems through one or two switches in the flight deck in the event of smoke or flames. In the event of smoke or flames in the airplane flight deck or passenger cabin, the flightcrew's inability to turn off electrical power to the IFE system and other non-essential electrical systems could result in the inability to control smoke or flames in the airplane flight deckor passenger cabin during a non- normal or emergency situation, and consequent loss of control of the airplane.
99-24-11: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757-200 and -300 series airplanes, that requires modification of the slide/raft evacuation system by installing a girt reinforcement chafing patch. This amendment is prompted by reports of holes in the inflatable area of the slide/raft evacuation system due to chafing against the installation support bracket. The actions specified by this AD are intended to prevent holes in the inflatable portion of the slide/raft evacuation system, which could result in the slide/raft being less effective as a raft during an emergency water landing.
71-18-04: 71-18-04 BELL: Amdt. 39-1280 as amended by Amendment 39-1692. Applies to Bell Models 206A and 206B helicopters certificated in all categories, equipped with main rotor blades, P/N 206-010-200-29. Compliance required as indicated. To detect and prevent possible corrosion and fatigue cracks in the main rotor blade spar lower surface adjacent to the tip inertia weight attachment screws, accomplish following: (a) Inspect those main rotor blades having 600 or more hours total time in service on May 5, 1971 within 25 hours time in service therefrom, unless already accomplished in accordance with paragraph (c). (b) Inspect those main rotor blades having less than 600 hours time in service on May 5, 1971 before reaching 625 hours total time in service in accordance with paragraph (c). (c) Visually inspect the lower surface of the blade from blade station 170 to 180 in the area of the screw heads for paint blisters, raised areas, paint cracks and for exposed metal andaccomplish repetitive inspections at intervals of not more than 100 hours time in service from the last inspection. (1) If paint blisters, raised areas or paint cracks are found, remove the finish in accordance with the instructions of Item 3.c of Bell Helicopter Company Service Bulletin No. 206A-19, Revision A, dated March 12, 1971 or later FAA approved revision, and inspect for corrosion and cracks in the spar adjacent to the screw heads using a dye penetrant or equivalent inspection method. (i) If cracks are found, remove and replace the blade before further flight. (ii) If corrosion is found, follow repair and limitation instructions on page 2-18A, paragraph 2-16, subparagraph e(3) in the Model 206A Maintenance and Overhaul Manual as revised October 15, 1970 or FAA approved equivalent. (iii) If no corrosion or cracks are found, treat and refinish the exposed or unpainted area in accordance with Item 4.b(1) of Bell Helicopter Company Service Bulletin No. 206A-19, Revision A, dated March 12, 1971, or later FAA approved revision. (2) If no paint blisters, raised areas or paint cracks are found but exposed metal is found, treat exposed area in accordance with paragraph 4.b(2) of Bell Helicopter Company Service Bulletin No. 206A-19, Revision A, dated March 12, 1971, or later FAA approved revision. (d) Visually inspect the lower surface of the blade from blade station 170 to 180 in the area of the screw heads for paint blisters, raised areas, paint cracks and for exposed metal and accomplish repetitive inspections at intervals of not more than 25 hours time in service from the last inspection. (1) If paint blisters, raised areas or paint cracks are found, the inspections and surface treatment of subparagraph (c) (1) are required. (2) If only exposed metal is found, clean, rinse and dry the surface and apply non-siliconized wax to the exposed metal. (3) The inspections and waxing specified in paragraph (d) may beperformed by the pilot. NOTE: For the requirements regarding listing of compliance and method of compliance with this AD in the aircraft maintenance record, see FAR 91.173. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the Service Manager, Bell Helicopter Company, P. O. Box 482, Fort Worth, Texas 76101. These documents may also be examined at the Office of the Regional Counsel, Southwest Region, FAA, 4400 Blue Mound Road, Fort Worth, Texas, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C. and at the Southwest Regional Office in Fort Worth, Texas.This AD, Amendment 39-1280 supersedes Amendment 39-1182 (36 F.R. 6740), AD 71- 07-03. Amendment 39-1280 became effective September 3, 1971. This amendment 39-1692 becomes effective September 3, 1973.
99-24-12: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Lockheed Model L-1011-385 series airplanes, that currently requires revision of the Airplane Flight Manual (AFM) to prohibit operation of the fuel boost pumps when fuel quantities are below certain levels, and to add maintenance procedures for operating the airplane under certain conditions. That AD also requires the installation of a placard on the engineer s fuel panel to advise the maintenance crew that operation of the fuel boost pumps is prohibited under certain conditions. This amendment adds a terminating modification for the requirements of the existing AD. This amendment is prompted by reports of internal electrical failures in the fuel boost pump of the wing fuel tanks that could result in either electrical arcing or localized overheating. The actions specified by this AD are intended to prevent such electrical arcing or overheating, which could breech the protective housing of the fuel boost pump and expose it to fuel vapors and fumes, and consequent potential fire or explosion in the wing fuel tank.
2014-09-07: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes. This AD was prompted by reports of cracking of the forward bulkhead web, web stiffeners, attachment angles, and thermal anti-ice (TAI) spray ring assemblies of the engine air intake cowl. This AD requires replacing the forward bulkhead assembly, TAI spray ring assembly, and attachment fittings of the air intake cowl. We are issuing this AD to prevent the failure of air intake cowl components due to cracking, which could result in the air intake cowl separating from the engine and striking critical airplane control surfaces that could result in a loss of airplane control; severe engine damage and loss of thrust; or large parts striking a person or property on the ground.
75-17-18: 75-17-18 SOCATA: Amendment 39-2320. Applies to Socata Models Rallye 100S, Serial Number 2294; MS.880B, Serial Numbers 2299 through 2531; and MS.892E-150, 893E and 894E, Serial Numbers 12121 through 12531 airplanes, certificated in all categories. Compliance is required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent loss of aileron control due to interference with the wing flap control system, modify the wing flap control system, re-rig the wing flap control system, and check for freedom from interference between the wing flap control system and aileron control system in accordance with Socata Service No. 111 GR. 27-11, dated April 1974, or an FAA-approved equivalent. This amendment becomes effective August 19, 1975.
99-24-15: This amendment supersedes an existing airworthiness directive (AD), applicable to General Electric Company (GE) CF6 series turbofan engines, that currently requires initial and repetitive ultrasonic and eddy current inspections of high pressure compressor rotor (HPCR) stage 3-9 spools for cracks. This amendment defines more aggressive inspection intervals for certain HPCR stage 3-9 spools, adds CF6-80E1 engines to the inspection program, adds inspection requirements for spools manufactured from 8 inch diameter billet, adds inspection requirements for stage 3-5 blade slot bottoms, and adds inspection requirements for web and hub-to-web transition areas. This amendment is prompted by analysis of recent HPCR stage 3-9 spool inspection results and separations, and assessment of the adequacy of the existing program to prevent HPCR stage 3-9 spool cracking and separation. As a result of that assessment, the FAA has determined there is a need to make changes to the existing AD.The actions specified by this AD are intended to prevent HPCR stage 3-9 spool cracking and separation, which can result in an uncontained engine failure and aircraft damage.
2022-18-07: The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. This AD was prompted by review of maintenance instructions that showed conflicting methods of recording torque cycles for certain parts. This AD requires recalculating the torque cycles of certain parts and updating log cards; removing certain other parts from service; and applying an operational restriction on certain parts, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD also requires incorporating the re-calculated life limits into existing maintenance records. The FAA is issuing this AD to address the unsafe condition on these products.
73-18-01: 73-18-01 GENERAL DYNAMICS: Amdt. 39-1705. Applies to General Dynamics 340/440/580/640 (Convair) Series and Model C-131E airplanes certificated in all categories. Compliance required as indicated. To prevent possible collapse of the nose landing gear due to fatigue cracks in the drag strut upper left hand segments, accomplish the following. (a) Within ten landings after the effective date of this A.D., unless already accomplished with the last 590 landings prior to this A.D., and at one additional interval not to exceed 600 landings thereafter, preform an external visual inspection of all P/N 340-5210103, 340-5215103 or 340-7310231 nose landing gear drag strut upper left hand segments for crack development in the area depicted by Figure 1, View A-A, General Dynamics Service Bulletin 640(340D) No. 32-7, dated June 20, 1973, by dye penetrant, eddy current or ultrasonic methods, per the accomplishment instructions in S.B. 32-7, dated June 20, 1973, or later FAA-approvedrevisions. (Disassembly of strut is not required). (1) If crack development is noted, replace the drag strut prior to further flight, with new P/N 340-7310231-1, or serviceable parts (Items 1 through 4, Convair Service Engineering Report No. 340-44A/440-44A, dated June 16, 1961). (2) If crack development is not indicated after the accomplishment of the foregoing inspections, repeat the inspection thereafter at intervals not to exceed 2,400 landings. If cracks are discovered, replace the drag strut, prior to further flight per a(1) above. (3) If new P/N 340-7310231-1 is used as a replacement, the inspections of this A.D. may be discontinued, and normal maintenance practices will be observed. (4) If a re-worked part (cf: Convair Service Engineering Report, No. 340- 44A/440-44A) is used as a replacement, perform an inspection for crack development prior to an additional 600 landings after installation per a, above. Repeat the inspections per a and (2) above.(5) Any parts removed for crack development per this A.D., or as a result of any other inspection indicating a like condition, may not be returned to service unless a specific rework procedure has been approved by the Chief, Aircraft Engineering Division, FAA Western Region, and accomplished as to said parts. (6) Aircraft may be operated per FAR 21.197 to a base for accomplishment of maintenance per this A.D. (b) Equivalent inspections and installations may be approved by the Chief, Aircraft Engineering Division, FAA Western Region. (c) For the purpose of complying with this A.D., subject to acceptance by the assigned FAA maintenance inspector, the number of landings may be determined by dividing each airplane's hours' time in service by the operator's fleet average time from takeoff to landing for the airplane type. This amendment is effective August 27, 1973 except those to whom it was made effective immediately by airmail letter, dated July 30, 1973.
99-24-07: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757 series airplanes equipped with Rolls Royce RB211 engines, that requires modification of the nacelle strut and wing structure. This amendment is prompted by reports indicating that the actual operational loads applied to the nacelle are higher than the analytical loads that were used during the initial design. Such an increase in loading can lead to fatigue cracking in primary strut structure prior to an airplane's reaching its design service objective. The actions specified by this AD are intended to prevent fatigue cracking in primary strut structure and consequent reduced structural integrity of the strut.
47-50-12: 47-50-12 STINSON: Applies to Model 108 Series Serial Numbers 1 through 3500. Compliance required every 100 hours of operation. Inspection of the stabilizer leading edge attachment to the fuselage should be made for fatigue cracks, after each 100 hours of operation. If fatigue cracks are present, reinforcements to the stabilizer fitting should be added. Inspection may be discontinued after reinforcement is installed. (Stinson Service Bulletin No. 254 dated September 5, 1947, covers this same subject.)
2014-09-09: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This AD was prompted by reports of two in-service occurrences on Model 737-400 airplanes of total loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed capability on one engine, and in-flight shutdown of the engine. This AD requires revising the maintenance program to incorporate a revision to the Airworthiness Limitations Section of the maintenance planning data (MPD) document. We are issuing this AD to detect and correct failure of the engine fuel suction feed of the fuel system, which, in the event of total loss of the fuel boost pumps, could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane.
99-24-06: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-100, -200, -300, -400, and -500 series airplanes; and Model 727-100 and -200 series airplanes. This amendment requires a one-time inspection to determine the presence and condition of the breather plug in each fuel tank boost pump; and either installation of a new plug or replacement of the boost pump with a new or serviceable pump, if necessary. This amendment is prompted by a report that breather plugs were missing from fuel tank boost pumps. The actions specified by this AD are intended to prevent possible ignition of fuel vapor in the fuel tank boost pump, which could result in a fuel tank explosion in the event of a boost pump internal failure.
85-14-52: 85-14-52 DeHavilland Aircraft of Canada, LTD.: Amendment 39-5184. Applies to all Model DHC-8-101 airplanes, certificated in any category, equipped with flap drive power units, Sunstrand Part Number 734177A or 734177B, Serial Numbers 101, 103-105 inclusive, and 107- 110 inclusive. Compliance is required as indicated, unless previously accomplished. To reduce the hazards associated with flap drive power unit malfunctions, prior to further flight, accomplish the following: A. Incorporate the following into the limitations section of the airplane flight manual. This may be accomplished by including a copy of this AD in the airplane flight manual. 1. Flaps extended speed (VFE) is limited to 130 KIAS for all flap angles; 2. Single engine approach training is prohibited; 3. The flap indicator must be monitored to confirm that the selected angle is achieved; and 4. In the event of an engine inoperative approach, flap should be selected as early as possibleand landing flap should not be selected until the landing is assured. If the selected flap angle is exceeded, flap must be reselected to 0 degrees and the approach and landing continued at not less than the 0 flap 1.3 VS in figure 5/5A-4-2. B. Within two weeks after the effective date of this amendment, replace the flap drive power units listed above with 27-2 units modified in accordance with DHC Service Bulletin 8-27-6 dated July 10, 1985, and remove the AFM limitations required by paragraph A., above. C. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, New York Aircraft Certification Office, FAA, New England Region. All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to DeHavilland Aircraft of Canada, Ltd., Garrett Boulevard, Downsview, Ontario M3K 1Y5, Canada. These documents may be examined at the FAA, NorthwestMountain Region, Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington, or the FAA, New England Region, New York Aircraft Certification Office, 1815 South Franklin Avenue, Room 202, Valley Stream, New York. This amendment becomes effective December 31, 1985, as to all persons, except those persons to whom it was made immediately effective by telegraphic AD 85-14-52, issued July 18, 1985.
97-21-14: 97-21-14 CONSTRUCCIONES AERONAUTICAS, S.A. (CASA): Amendment 39-10167. Docket 96-NM-120-AD. Applicability: All Model C-212 series airplanes, certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent the loss of hydraulic damping in the main landing gear, due to failure of the screw pins that hold the restrictor pistons on the slide tubes of the shock absorbers, and consequent structural damage to the airplane, accomplish the following: (a) Prior to the accumulation of 600 hours time-in-service after the effective date of this AD, conduct an inspection of each restrictor piston to detect the number and condition of installed threaded screw pins; in accordance with CASA Service Bulletin SB-212-32-38, dated June 16, 1994. Prior to further flight, replace any loose pin, in accordance with the service bulletin and accomplish the following, as applicable: (1) For any piston on which three threaded screw pins are installed: No further action is required by this AD for this piston. (2) For any piston on which one pin is installed and two holes are sealed with epoxy: Remove the epoxy, and install two additional threaded screw pins, in accordance withthe service bulletin. Thereafter, no further action is required by this AD for this piston. (3) For any piston on which one pin is installed and no other holes exist: (i) Repeat the inspection required by paragraph (a) of this AD at intervals not to exceed 600 hours time-in-service until the modification required by paragraph (a)(3)(ii) of this AD is accomplished. (ii) Prior to the accumulation of 1,800 hours time-in-service after the effective date of this AD, or within 3 years after the effective date of this AD, whichever occurs later, modify this piston in accordance with the service bulletin. Accomplishment of this modification constitutes terminating action for the repetitive inspection requirements of paragraph (a)(3)(i) of this AD. Thereafter, no further action is required by this AD with regard to that piston. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113. NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The actions shall be done in accordance with CASA Service Bulletin SB-212-32-38, dated June 16, 1994. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Construcciones Aeronauticas, S.A., Getafe, Madrid, Spain. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. NOTE 3: The subject of this AD is addressed in Spanish airworthiness directive 07/94, dated October 1994. (e) This amendment becomes effective on November 24, 1997.
99-24-14: This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) CF6-80E1A2 series turbofan engines. This action requires removing from service stage 2 high pressure turbine (HPT) disks and impeller spacers prior to exceeding new, lower cyclic life limits and imposes a drawdown program for those parts that currently exceed, or will exceed, the new lower limits. This amendment is prompted by the results of a refined low cycle fatigue (LCF) analysis. The actions specified in this AD are intended to prevent LCF cracking and failure of stage 2 HPT disks and impeller spacers, which could result in an uncontained engine failure and damage to the aircraft.